Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan co do snippets" » "phan bo do snippets", "phan cong do snippets", "phan cac do snippets", "phan co dot snippets", "phan co don snippets", "phan co so snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("phan co do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan co do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan co do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan co do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.